/**
 * @file MathUtil.h
 * @author  Aljosa Osep <aljosa.osep@gmail.com, Fletcher Dunn, Ian Parnberry>
 * @version 1.0
 *
 * @section LICENSE
 *
 * Redistribution and use in source and binary forms, with or without modification, are
 * permitted provided that the following conditions are met:

 *  1. Redistributions of source code must retain the above copyright notice, this list of
 *    conditions and the following disclaimer.

 *  2. Redistributions in binary form must reproduce the above copyright notice, this list
 *     of conditions and the following disclaimer in the documentation and/or other materials
 *     provided with the distribution.

 * THIS SOFTWARE IS PROVIDED BY <Aljosa Osep> ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL <Aljosa Osep>> OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 * The views and conclusions contained in the software and documentation are those of the
 * authors and should not be interpreted as representing official policies, either expressed
 * or implied, of <Aljosa Osep>.
 *
 * @section DESCRIPTION
 *
 * MathUtil - math utility functions header
 * Based on examples from 3D Math Premier of Graphics and Games Development book
 * Original authors: Fletcher Dunn, Ian Parnberry. Thanks!
 */

#ifndef MATHUTIL_H
#define MATHUTIL_H

#include <cmath>

// Constants
#define kPi 3.14159265f
#define k2Pi (kPi * 2.0f)
#define kPiOver2 (kPi / 2.0f)
#define k1OverPi (1.0f / kPi)
#define k1Over2Pi (1.0f / k2Pi)


// Wrap angle in range -pi ... pi by adding correct multiple of 2pi
extern float wrapPi(float theta);

// Safe acos
extern float safeAcos(float x);

// Calculate both sine ans cosine of angle
extern void sinCos(float *retSin, float *retCos, float theta);

extern float Rad2Deg(float theta);
extern float Deg2Rad(float theta);

#endif // MATHUTIL_H
